Recieved some spam via this site from teefury.I have never used teefury and I definitely never signed up for their email list.How did they get my email address?On a positive note...The email I got went directly into my spam folder(gmail).If gmail points their emails directly into spam folder then this site is obviously not legit and is just a spam machine.
I get spam from these guy's clients but they are responsive to spam complaints. Due to their diligence, they have earned my trust.
Their clients appear to use them for spamming, without their approval, thus they need spam complaints sent to them so as to take action.
This is a good site as it is possible to opt-out and makes list building for legitimate newsletters manageable. If you have any problems write mailchimp directly and they will take the necessary action so you won't get spammed.